Patent US4565723A successfully refreshed from Google Patents.
US4565723A
Expired / Lapsed
US
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Composite polymeric panel and process for making same
Assignee: CENEPRINT PTY Ltd C/O QUEST INVESTMENTS Ltd
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Filing: 1983-11-10
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Granted: 1986-01-21
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Expires: 2003-11-10
Abstract
Abstract A skeletal layer of a first polymeric material, consisting of two parallel plates interconnected by spaced-apart webs, is overlain on at least one plate surface by a reinforcing layer of a more wear-resistant or otherwise protective second polymeric material, possibly with interposition of an equalizing layer of a third polymeric material. The reinforcing layer may carry a lower-melting coating of a fourth polymeric material serving to hold a covering such as a textile fabric in position thereon. The voids of the skeletal layer may be filled with foam plastic. The composite panel can be formed by joint extrusion of all polymeric layers and can be subjected to subsequent deformation under heat and pressure into a shaped body.
Inventors
- 👤 Elisabeth Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:15
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/14; A01G9/1438; B; B32; B32B; B32B3/00; B32B3/26; B29; B29C; B29C44/00; B29C44/20; B29C44/22; B32B27/00; B32B27/06; B32B27/065; B32B27/08; B32B27/30; B32B27/308; B32B27/32; B32B27/36; B32B27/365; B32B3/10; B32B3/12; B32B5/00; B32B5/18; B32B5/20; B32B7/00; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/54; E04C2/543; E04D; E04D3/00; E04D3/02; E04D3/06; B29C48/00; B29C48/03; B29C48/09; B29C48/11; B29C48/12; B29C48/15; B29C48/151; B29C48/16; B29C48/18; B29C48/19; B29C48/21; B32B2410/00; B32B2607/00; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/234; Y10T428/24; Y10T428/24174; Y10T428/24479; Y10T428/24562; Y10T428/24628; Y10T428/24661; Y10T428/24744
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
70 words
A composite panel comprising: a basic skeletal layer of a light-transmissive first polymeric material, said first polymeric material being a polycarbonate, and said skeletal layer consisting of two parallel plates interconnected by spaced-apart webs leaving voids therebetween; and a reinforcing layer of a light-transmissive protective second polymeric material, said second polymeric material being a polyacrylate, and said reinforcing layer overlying at least one of said plates of said skeletal layer.
Claim 2
Dependent Claim
70 words
A composite panel comprising: a basic skeletal layer of a light-transmissive first polymeric material, said first polymeric material being a polycarbonate, and said skeletal layer consisting of two parallel plates interconnected by spaced-apart webs leaving voids therebetween; and a reinforcing layer of a light-transmissive protective second polymeric material, said second polymeric material being a polyacrylate, and said reinforcing layer overlying at least one of said plates of said skeletal layer.
Claim 3
Dependent Claim
27 words
A panel as defined in claim 1, further comprising an equalizing layer of a light-transmissive third polymeric material interposed between said skeletal layer and said reinforcing layer.
Claim 4
Dependent Claim
14 words
A panel as defined in claim 2 wherein said third polymeric material is polyethylene.
Claim 5
Dependent Claim
17 words
A panel as defined in claim 1 wherein said voids are filled with a highly porous polymer.
Claim 6
Dependent Claim
16 words
A panel as defined in claim 4 wherein said highly porous polymer is a foam plastic.
Claim 7
Dependent Claim
65 words
A composite panel comprising: a basic skeletal layer of a first polymeric material, said skeletal layer consisting of two parallel plates interconnected by spaced-apart webs leaving voids therebetween; and a reinforcing layer of a protective second polymeric material, said reinforcing layer overlying at least one of said plates of said skeletal layer; said second polymeric material being of greater hardness than said first polymeric material.
Claim 8
Dependent Claim
65 words
A composite panel comprising: a basic skeletal layer of a first polymeric material, said skeletal layer consisting of two parallel plates interconnected by spaced-apart webs leaving voids therebetween; and a reinforcing layer of a protective second polymeric material, said reinforcing layer overlying at least one of said plates of said skeletal layer; said second polymeric material being of greater hardness than said first polymeric material.
Claim 9
Dependent Claim
15 words
A panel as defined in claim 6 wherein said second polymeric material is a polycarbonate.
Claim 10
Dependent Claim
34 words
A panel as defined in claim 6 wherein said reinforcing layer is coated with an adhesive layer of a further polymeric material having a lower melting point than said first and second polymeric materials.
Claim 11
Dependent Claim
21 words
A panel as defined in claim 8, further comprising a textile covering bonded by said adhesive layer to said reinforcing layer.
Claim 12
Dependent Claim
16 words
A panel as defined in claim 8 wherein said further polymeric material is an ethylene-vinylacetate copolymer.
Claim 13
Dependent Claim
12 words
A panel as defined in claim 9 wherein said layers are curved.
Claim 14
Dependent Claim
17 words
A panel as defined in claim 6 wherein said voids are filled with a highly porous polymer.
Claim 15
Dependent Claim
16 words
A panel as defined in claim 12 wherein said highly porous polymer is a foam plastic.
Claim 16
Dependent Claim
108 words
A process for making a composite panel, comprising tthe steps of jointly extruding first and second light-transmissive polymeric materials, of which the former is a polycarbonate and the latter is a polyacrylate, into the forms of (a) a basic skeletal layer of said first polymeric material and having two parallel plates interconnected by spaced-apart webs leaving voids therebetween, and (b) at least one protective reinforcing layer of said second polymeric material and overlying a respective one of said plates of said skeletal layer, allowing each said reinforcing layer to bond to the respective one of said plates of said skeletal layer, and cutting the resulting laminate into sections.
Claim 17
Dependent Claim
108 words
A process for making a composite panel, comprising tthe steps of jointly extruding first and second light-transmissive polymeric materials, of which the former is a polycarbonate and the latter is a polyacrylate, into the forms of (a) a basic skeletal layer of said first polymeric material and having two parallel plates interconnected by spaced-apart webs leaving voids therebetween, and (b) at least one protective reinforcing layer of said second polymeric material and overlying a respective one of said plates of said skeletal layer, allowing each said reinforcing layer to bond to the respective one of said plates of said skeletal layer, and cutting the resulting laminate into sections.
Claim 18
Dependent Claim
35 words
A process as defined in claim 14 wherein said voids formed between said webs and said plates are filled during the extrusion with a polymeric substance accompanied by a foaming agent and expanding upon extrusion.
Claim 19
Dependent Claim
19 words
A process as defined in claim 14 wherein said sections are deformed under heat and pressure into shaped articles.
Claim 20
Dependent Claim
39 words
A process as defined in claim 14 wherein a third light-transmissive polymeric material is jointly extruded with said first and second polymeric materials into the form of an equalizing layer interposed between said skeletal layer and said reinforcing layer.
Claim 21
Dependent Claim
14 words
A process as defined in claim 17 wherein said third polymeric material is polyethylene.
Claim 22
Dependent Claim
110 words
A process for making a composite panel, comprising the steps of jointly extruding first and second polymeric materials, of which the latter has a greater hardness than the former when they are fully solidified, into the forms of (a) a basic skeletal layer of said first polymeric material and having two parallel plates interconnected by spaced-apart webs leaving voids therebetween, and (b) at least one protective reinforcing layer of said second polymeric material and overlying a respective one of said plates of said skeletal layer, allowing each said reinforcing layer to bond to the respective one of said plates of said skeletal layer, and cutting the resulting laminate into sections.
Claim 23
Dependent Claim
110 words
A process for making a composite panel, comprising the steps of jointly extruding first and second polymeric materials, of which the latter has a greater hardness than the former when they are fully solidified, into the forms of (a) a basic skeletal layer of said first polymeric material and having two parallel plates interconnected by spaced-apart webs leaving voids therebetween, and (b) at least one protective reinforcing layer of said second polymeric material and overlying a respective one of said plates of said skeletal layer, allowing each said reinforcing layer to bond to the respective one of said plates of said skeletal layer, and cutting the resulting laminate into sections.
Claim 24
Dependent Claim
35 words
A process as defined in claim 19 wherein said voids formed between said webs and said plates are filled during the extrusion with a polymeric substance accompanied by a foaming agent and expanding upon extrusion.
Claim 25
Dependent Claim
19 words
A process as defined in claim 19 wherein said sections are deformed under heat and pressure into shaped articles.
Claim 26
Dependent Claim
41 words
A process as defined in claim 19 wherein said reinforcing layer is coated with a relatively low-melting polymeric material during extrusion, and a textile fabric layer is bonded to each of said sections with the aid of said low-melting polymeric material.
Claim 27
Dependent Claim
15 words
A process as defined in claim 22 wherein said second polymeric material is a polycarbonate.
Claim 28
Dependent Claim
16 words
A process as defined in claim 23 wherein said low-melting polymeric material is an ethylene-vinylacetate copolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |